RU2526855C1 - Multifunctional distributor for step motor control - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: in multifunctional distributor for step motor control there is additional convolution circuit, the seventh output of permanent memory, a bus for standard operation and new functional links specified in the application materials.

EFFECT: expansion of functional capabilities due to provision of the known switching and idle modes for motors with various quantity of phase windings and provision of the step motor operation in mode of alternating cycling controlled through busbars of switching mode selection as well as introduction of automatic control over standard functioning of the device.

4 dwg, 2 tbl

Description

Known [1] is a pulse distributor for controlling a four-phase stepper motor, containing control buses, clock pulses, reverse, switching mode selection, a reversible counter and multiplexers, the address inputs of which are connected to the counter discharge outputs, and the outputs are used as outputs of a distributor that implements modes four-cycle alternating and paired reverse switching, as well as parking modes with windings on or off. However, this device does not implement the switching modes of three-phase and six-phase stepper motors, it does not provide automatic control of failures and failures of the device.

Closest to the claimed distributor is a device for controlling a stepper motor [2], comprising a first, second and third bus for selecting a switching mode, a control bus, a clock bus, a reverse bus, a reversible 2/12 counter, the first, second and third inputs of which are connected to control bus, clock bus, reverse bus, respectively, read-only memory, the first and fourth address inputs of which are connected to the counter outputs of the same name, the fifth and eighth inputs of the read-only memory device are connected respectively, with the third, second, first buses for switching the switching mode and reading permission, and the first and sixth outputs are used as the outputs of the device, which allows implementing the three-cycle, four-cycle, six-cycle alternating and pair modes, twelve-cycle reverse switching, as well as de-energized parking and parking under electric current. However, this device does not detect a malfunction.

The invention is aimed at expanding the functionality of the device and increasing the efficiency of its operation.

This is achieved by the fact that the convolution circuit, the check odd check of read-only memory of the read-only memory, the output bus is “regular operation”, the first and seventh outputs of the distributor are connected to the inputs of the convolution scheme of the same name, the output of which is connected to the “regular operation” bus, ".

Figure 1 shows the block diagram of the distributor, figure 2 is a diagram of the connection of the phase windings of a three-phase motor to the outputs of the distributor, as well as cycles of three-stroke and six-stroke reverse switching and the corresponding diagrams of the stator field. Figure 3 shows the connection diagram of the phase windings of a six-phase motor to the outputs of the distributor, as well as the cycles of a three-stroke, six-stroke, twelve-cycle reverse switching and the corresponding diagrams of the stator field. Figure 4 shows the connection of the phase windings of a four-phase motor to the outputs of the distributor, as well as the cycles of a four-stroke pair and alternate reverse switching and the corresponding diagrams of the stator field.

The distributor contains buses for selecting the switching mode (1-3, control bus 4, clock bus 5, reverse bus 6, read enable bus, reversible 2/12 counter 8, read-only memory 9, convolution circuit 10, "standard operation" bus 11) .

The selection mode switching buses 3, 2, 1 are connected to the inputs 5, 6, 7 of the read-only memory, the control bus 4 is connected to the first input of the reverse counter 8, the clock bus 5 and the reverse bus 6 are connected to the second and third inputs of the reverse counter, permission bus reading 7 is connected to the eighth input of read-only memory 9, outputs 1-4 of the reverse counter are connected to the same inputs of read-only memory 9, the outputs of which 1-7 are connected to 1-7 inputs of convolution circuit 10, and outputs 1-6 are groups the output of the distributor, the output 11 of the convolution circuit 10 is the output of the "regular work" of the inventive distributor.

The distributor operates as follows. At the initial installation, the device outputs are connected through power amplifiers to the phase windings of the stepper motor in accordance with FIGS. 2-4, and a switching mode code is set at the inputs 5-7 of the permanent storage device. For example, the first, second, third outputs of the distributor b ₁ -b ₃ through power amplifiers are connected to the windings of the first, second, third phases of a three-phase motor (figure 2), and on the buses 1-3 of the switching mode, the code 111 of the three-cycle alternating switching mode is set. In this case, the senior bits of the address a ₅ a ₆ a ₇ (Fig. 1) of the memory cells of the permanent storage device are formed, the value of the lower address bits of which a ₁ a ₂ a ₃ a ₄ is represented by the status code of the reverse counter at its outputs 1-4. If there is a read permission signal E = 1, the content code of the read-only memory at the address a ₁ a ₂ a ₃ a ₄ a ₅ a ₆ a ₇ is output to the output bits of the device b ₁ -b ₇ , providing a given switching of the phase voltage of the motor in accordance with the tables 1, 2, the value E = 0 sets the variables b ₁ -b ₇ at the device output equal to zero, ensuring the implementation of the parking mode with de-energized motor windings.

The value of the logical variable V = 1 of the control bus 4 permits the counting of pulses arriving on the clock bus 5 to increase or decrease the status code of the reverse counter depending on the level on the reverse bus 6, and each pulse corresponds to a single movement of the motor rotor in the forward or reverse direction.

обеспечивается реализация режима стоянки под током.At $$\overline{V}\wedge E=\mathrm{one}$$

the implementation of the parking mode under current is ensured.

для распределителя, функционирующего без отказов, в этом случае S'=1. Функционирование распределителя при нечетном числе искажений приведено в таблице 2.The convolution scheme 10 implements the operation S '= b ₁ ⊕ b ₂ ⊕ b ₃ ⊕ b ₄ ⊕ b ₅ ⊕ b ₆ ⊕ b ₇ , where b ₁ -b ₆ are the logical variables that control the switching of the windings of the stepper motor (b _i = 1 corresponds turn on the winding), and b ₇ is the parity check oddness equal to $$\overline{b}=b_{\mathrm{one}}\oplus b_2\oplus b_3\oplus b_{\mathrm{four}}\oplus b_5\oplus {\mathrm{<figure-callout\; id="6"\; label="b"\; filenames="00000009.png"\; state="\{\{state\}\}">b</figure-callout>}}_6$$

for a valve operating without failures, in this case S '= 1. The operation of the distributor with an odd number of distortions is shown in table 2.

Information sources

1. Copyright certificate SU No. 1444822, Cl. Н02Р 8/00, bull. No. 15, 04/23/89.

2. Patent RU 2417512, Cl. Н02Р 8/00, Н02Р 8/20, bull. No. 21, 07/27/2011.

штатный режим, прямая коммутация)3. Discrete electric drive with stepper motors / Edited by MG Chilikin. M .: "Energy", 1971. A multi-functional distributor for controlling a stepper motor (no failures, $$S={\overline{b}}_7\oplus b_7=\mathrm{one}$$

normal mode, direct switching)

Multifunctional valve for controlling a stepper motor (odd distortion detection mode)

Claims (1)

A multifunctional distributor for controlling a stepper motor, comprising the first, second and third buses for selecting a switching mode, a control bus, a clock bus, a reverse bus, a reversible counter, the first, second and third inputs of which are connected to a control bus, a clock bus, a reverse bus, respectively the storage device is the first - fourth address inputs of which are connected to the counter outputs of the same name, the fifth - the eighth inputs of the read-only memory connected respectively to the third, in first, the sixth outputs are used as the device outputs, characterized in that the convolution circuit, the “normal operation” bus, the seventh output of the permanent storage device are additionally introduced into the distributor, the first outputs being the seventh permanent storage device is connected to the inputs of the convolution circuit of the same name, the output of which is connected to the bus "regular work".

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